I know this sounds snarky, but it's serious: Are you married?
Ideally a life partner will share many of your values, but no two people share all values, and you'll need to respect the ones that differ. (Even if you're both Bayesian, in area where you have different values/axioms you will not necessarily agree).
Attempt to make beliefs pay rent, and beliefs in the supernatural will likely melt away as they fail to constrain your anticipated experiences.
And don't worry too much about supernatural beliefs. Just keep trying to make your beliefs correspond to reality, and see where that goes.
Good question :-)
We could measure them against some non-relativist ethical standard, like "US Dollars lost", "lives lost", "person-weeks stuck in traffic" or somesuch.